Philosophical transactions. A continuation to the alphabetical index of the matter contained in the Philosophical transactions of the Royal society of London; from vol. LXXI. to vol. CX., the year 1781 to the year 1820 inclusive.

Philosophical transactions. A continuation to the alphabetical index of the matter contained in the Philosophical transactions of the Royal society of London; from vol. LXXI. to vol. CX., the year 1781 to the year 1820 inclusive.